Cannabinoid Hyperemesis Syndrome in the News Lately

I’ve seen a few articles about Cannabinoid Hyperemesis Syndrome (CHS) and because my funny bone is sensitive to provocative titles, I first read the one with the title that starts off with “I still partly think this is bullshit…” My reference list resulting from a quick search is below.

Of course, I don’t think CHS is “bullshit” (quote from an emergency room patient in the Collins et al paper). I agree it’s hard to diagnose and the news media tends to sensationalize it by promoting popular terminology like “scromiting,” which my spell checker doesn’t recognize. This is a vogue portmanteau word combining screaming and vomiting. It makes me wonder why someone didn’t try harder to come up with a portmanteau that might be more descriptive of the complex triad of vomiting, belly aches, hot baths, and screaming. Why not barfinbawlinbellyachinbathingbadness?

But it’s not funny and attempts to attach funny words like scromiting to the condition by the press (or whoever) is misguided.

I found one systematic review and treatment algorithm (Hsu et al) written to guide consultation-liaison psychiatrists who are likely to get called when CHS patients are admitted to emergency departments. However, I think the place to start would be the StatPearls review by Cue et al. One thing I found out from that paper is that the interesting ACCENT study ((Achieving Cannabis Cessation: Evaluating N-Acetylcysteine Treatment) the authors cite does not yet have results available, although it was started way back in 2014.

Just a couple of comments about the treatment algorithm by Hsu et al: haloperidol can cause dystonic reactions and akathisia as well as cardiac conduction problems like QTc prolongation and more. One episode of neck dystonia or akathisia or both can lead to mistrust of physicians who administer the causative agents, especially if there were no explanations of side effects as well as potential benefits. Benzodiazepines, while they may work, may also lead to some patients with substance use disorders becoming attached to them. Less commonly, patients with somatoform, factitious, or eating disorders will complicate the diagnostic picture.

Reference List:

Alexandra B. Collins, Francesca L. Beaudoin, Jane Metrik, Rachel S. Wightman,

“I still partly think this is bullshit”: A qualitative analysis of cannabinoid hyperemesis syndrome perceptions among people with chronic cannabis use and cyclic vomiting,

Drug and Alcohol Dependence,

Volume 246,

2023,

109853,

ISSN 0376-8716,

(https://www.sciencedirect.com/science/article/pii/S0376871623000911)

Abstract: Background

Cannabis is the most widely used psychoactive substance in the United States (US), with reported use patterns increasing among adults in recent years. Cannabinoid hyperemesis syndrome (CHS) has been one concern related to increased cannabis use patterns. US emergency departments have reported an increase of CHS cases over the last decade, yet little is known about CHS. This study explores the experiences of people with chronic cannabis use and cyclic vomiting and their perceptions of CHS.

Methods

Semi-structured interviews were conducted with 24 people recruited from a prospective cohort of patients presenting to Rhode Island emergency departments with symptomatic cyclic vomiting and chronic cannabis use. Data were analyzed thematically using NVivo.

Findings

Participants characterized their cyclic vomiting as related to food and alcohol consumption patterns, stress, and existing gastrointestinal issues. Despite recurrent episodes of cyclic vomiting, nausea, and abdominal pain, many participants remained uncertain whether their symptoms were driven by cannabis. Many participants relied on at-home research to assess their symptoms and seek out management approaches. Clinical treatment recommendations focused on cannabis cessation. However, most participants felt clinical recommendations failed to consider the complexity and challenge of stopping cannabis use given the chronicity of use and therapeutic benefits some perceived cannabis to have.

Conclusions

Although cannabis cessation is the only reported CHS cure to date, additional clinical and non-clinical treatment approaches are needed to better support people with chronic cannabis use and cyclic vomiting to meet their ongoing needs.

Keywords: Cannabinoid hyperemesis syndrome; Cyclic vomiting; Cannabis use; Qualitative

Cue L, Chu F, Cascella M. Cannabinoid Hyperemesis Syndrome. [Updated 2023 Jul 3]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK549915/

Jennifer Hsu, Saurabh Kashyap, Cheryl Hurd, Lauren McCormack, Zachary Herrmann, Ann C. Schwartz, Joshua Jackson, Dustin DeMoss,

Treatment of cannabinoid hyperemesis syndrome: A systematic review and treatment algorithm for consultation-liaison psychiatrists,

General Hospital Psychiatry,

Volume 97,

2025,

Pages 185-191,

ISSN 0163-8343,

(https://www.sciencedirect.com/science/article/pii/S0163834325002038)

Abstract: Background

Cannabinoid Hyperemesis Syndrome (CHS) is a cyclical vomiting syndrome associated with chronic cannabis use and is often resistant to anti-emetics. Despite increasing incidence of suspected CHS, literature regarding its treatment is limited, and there are no established treatment guidelines.

Objectives

With the goal of establishing treatment guidelines for consultation-liaison (C-L) psychiatrists managing CHS, the authors systematically reviewed existing literature for pharmacologic treatment strategies using Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. With the results of the review, the authors propose a treatment algorithm for CHS.

Methods

We searched PubMed, PyschINFO & PsychARTICLES, Embase, and Web of Science from inception to July 2021 to identify literature describing treatment of CHS. We included cases of CHS where patient-level data describing the treatment of CHS was available. Pharmacologic treatments were considered beneficial if the patient’s nausea, hyperemesis, and urge to take hot showers resolved. Non-independent review of exclusion criteria assisted in reducing individual bias of the literature.

Results

The authors identified 34 eligible articles, consisting of 63 individual cases. Among these articles and cases, capsaicin cream, antipsychotics, and benzodiazepines were reported to improve CHS more effectively than other, more frequently used anti-emetics, such as promethazine, ondansetron, and metoclopramide.

Conclusion

An examination of treatment strategies for CHS can allow for more effective care while providing a foundation for further research in treatment. This proposed algorithm is designed to aid in establishing treatment strategies for C-L psychiatrists who assist with managing CHS for patients in general medical settings. The goal of this research is to establish evidence-based treatment guidelines for C-L psychiatrists who are managing patients with CHS in general medical settings. Recognizing the limitations of this algorithm being based on case reports adds to the necessity of further research in this area.

Registration

PROSPERO (https://www.crd.york.ac.uk/PROSPERO/view/CRD42021254888) registration number CRD42021254888.

Keywords: Cannabinoid hyperemesis syndrome; Treatment strategies; Systematic review; Pharmacologic treatment

Loganathan, P.; Gajendran, M.; Goyal, H. A Comprehensive Review and Update on Cannabis Hyperemesis Syndrome. Pharmaceuticals 202417, 1549. https://doi.org/10.3390/ph17111549

DEA Announces Rescheduling Marijuana from Schedule I to Schedule III and Inviting Public Comments

The DEA is asking for public comments on the rescheduling of marijuana from Schedule I to III. There are many comments:

See the Federal Register notice about proposed rulemaking.

Also see the Regulations government website for further information.

DEA to Reschedule Marijuana or Not?

I’ve seen an article posted in February of this year on the American Veterinary Medical Association (AVMA) about there being a plan afoot to change marijuana from DEA Schedule I to III or remove it from the Controlled Substances Act. I couldn’t find out anything about it except in in the AVMA article.

I can’t find what the FDA, HHS, or the DEA may or may not be doing as far as taking any action on about this, if any. I think it’s interesting that the AVMA reports the HHS plan to ask the DEA to change the scheduling of marijuana was “leaked” to the news outlets. There is a link to a New York Times story about it. I guess that’s better than nothing, though some might argue the point.

The AVMA article also linked to a letter from several members of congress urging the DEA to change the scheduling of marijuana, remove it from the Controlled Substances Act or risk getting their knuckles rapped with a ruler by Senator Chuck Schumer. Huh, what’s up with that?

I looked at the HHS website and found nothing suggesting that they are going after the DEA with a fire hose to get this done. The DEA is not mentioning anything about the project on their Drug Information web page.

The only ones talking about this publicly so far are the banks, the weed growers, and the AVMA as far as I can tell. The impression I get is that something is going to happen in a matter of months about decriminalizing and rescheduling marijuana. Things usually don’t happen that quickly in government.

I thought I was finished with this post until yesterday when I read U.S. Senator Mitt Romney’s letter to the DEA urging it not to move marijuana from Schedule I to Schedule III because it would violate something I needed to learn more about, which is an international treaty called the Single Convention.

The Single Convention was ratified by the U.S. Senate in 1967 and it’s part of an international treaty which says marijuana must remain classified as either Class I or II—until a congressman can clearly demonstrate the ability to walk heel to toe in a straight line for a distance not less than 10 yards after smoking a standard large bong of high-grade marijuana.

One thing I can gather from Senator Romney’s letter is that it verifies HHS’ did in fact recommend that the DEA reschedule marijuana.